package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.Objects;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO 员工登录信息
     * @return Employee 员工信息
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 进行md5加密密码，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (Objects.equals(employee.getStatus(), StatusConstant.DISABLE)) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     *
     * @param employeeDTO 新增员工信息
     */
    @Override
    public void addEmployee(EmployeeDTO employeeDTO) {
        // 拷贝员工信息到实体属性
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);

        // 设置默认密码并加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        // 设置默认基本字段信息
        employee.setStatus(StatusConstant.ENABLE); // 状态
        /*employee.setCreateTime(LocalDateTime.now()); // 创建时间
        employee.setUpdateTime(LocalDateTime.now()); // 修改时间*/
        // 使用 ThreadLocal 获取当前员工id
        /*Long id = BaseContext.getCurrentId();
        employee.setCreateUser(id); // 创建人
        employee.setUpdateUser(id); // 修改人*/

        // 新增员工操作
        employeeMapper.inset(employee);
    }

    /**
     * 分页查询员工
     * @param employeePageQueryDTO 员工分页查询条件
     * @return 员工分页查询结果
     */
    @Override
    public Page<Employee> getEmployeePage(EmployeePageQueryDTO employeePageQueryDTO) {
        return employeeMapper.selectPage(employeePageQueryDTO);
    }

    /**
     * 根据 ID 查询员工
     *
     * @param id 员工主键
     * @return 员工详情
     */
    @Override
    public Employee getEmployeeById(Long id) {
        return employeeMapper.selectById(id);
    }

    /**
     * 更新员工状态
     *
     * @param status 员工状态（1开启 0关闭）
     * @param id     员工主键
     */
    @Override
    public void updateEmployeeStatus(Integer status, Long id) {
        /*
        // 更新状态信息
        Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);
        // 更新其它信息
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        */
        // 构造器用法
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                /*.updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId())*/
                .build();
        employeeMapper.updateStatus(employee);
    }

    /**
     * 更新员工信息
     *
     * @param employeeDTO 员工信息
     */
    @Override
    public void updateEmployee(EmployeeDTO employeeDTO) {
        // 拷贝员工信息到实体属性
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);

        // 更新其它数据
        /*employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());*/

        // 更新操作
        employeeMapper.update(employee);
    }

}
